August 2021 Virtual Meeting


by Keith Yoerg (RRS Secretary)


The latest meeting of the Reaction Research Society took place Friday, August 13th and had 12 attendees who came and went, including a prospective student member. We had a lot of topics to discuss and some members had to leave early so we got right down to society business from the start of the meeting.

Screenshot of discussion during the monthly meeting

YOUTH ROCKETRY CLASS PLANNING & UPDATES

The RRS starting to plan for youth outreach classes – which have been on hold during the COVID-19 pandemic. Unfortunately, due to the delta variant the LAPD classes that were being planned for September at the Strive learning center have been postponed. However, it looks like we are on track to begin classes with the Boyle Heights YMCA after labor day.

This class is expected to have up to 60 students – which will be split into 2 groups that will attend every other Friday at 4pm on a rotating schedule. The current plan is to hold 5 classes per group, which means the program will run for 10 straight weeks. Any RRS member interested in helping during these classes will be required to complete a LiveScan background check. Please contact Frank at vicepresident@rrs.org for more details if interested.

Baby Bertha kit built by RRS Secretary Keith Yoerg

The current plan is for each student to build their own “Baby Bertha” model rocket manufactured by Estes. The EC is currently organizing logistics to allow each student an opportunity to fly their rocket twice (assuming the first launch is successful, of course!) at our MTA site in late October or early November. In addition, we are looking at the instructors building a high power rocket in tandem to show the similarities and differences between the construction methods. A demonstration flight of the high power rocket would be held on the same day as the model rocket flights, to give the kids a sense of what a more powerful flight would look like.

Discussion at the meeting included ideas around fast-drying non-toxic glue options for the model rockets, 3D printed fin alignment jigs to ensure arrow-straight flights of the kits, and logistics around the launch day like adding more low-power launch pad capabilities to the MTA site. We may also try to add an onboard camera to the high power kit to show the students a view of the ground falling away from onboard the rocket!

PERMANENT BATHROOM & OTHER MTA UPGRADES

Progress is continuing on the permanent RRS Bathroom structure. Work on cutting holes for doors and windows has been completed on the 20-foot shipping container and delivery is expected imminently to the new work site at Wilbur’s hangar. The next stages of construction including adding plumbing, fixtures, and the doors and windows.

RRS president Osvaldo informed the membership that he purchased a forklift attachment for the backhoe that is stationed in the Mojave desert – which will be a great help with moving tanks and other heavy items that are often required for liquid rocket tests at the MTA. Members also discussed upgrading the launch structures at the site, including an idea for an adapter to allow Alpha and Beta micrograin rockets to use the same rail system and moving over the large launch tower from the “graveyard” on the northern end of the MTA to a more permanent & upright location.

AUGUST MTA LAUNCH EVENTS

After a short review of the July MTA events (writeups by Dave Nordling can be found here and here), members were briefed on the “long campaign” work that is underway by the University of Michigan rocket club “MASA” this month. While typical events at our desert site last only 1-2 days, this campaign is expected to run for 10 or even https://www.socalstairlifts.com/ambien-zolpidem-online 14 days total. The exact length of time that they will be at the site depends on how quickly they are able to meet their objectives.

Some info on the MASA liquid engine that is undergoing testing at the MTA

The ultimate goal of the campaign is to conduct a static, hot fire of their 2,500 lbf (10s total impulse) liquid rocket engine. The engine runs on RP-1 and LOX, and utilizes liquid nitrogen and helium as pressurants. Several RRS members and Pryotechnic Operators have generously volunteered their time on both weekdays and weekends to assist the student team in meeting their goals. A writeup of the events will be posted to this site after the testing.

OSVALDO’S MICROGRAIN ROCKET AVIONICS

RRS president Osvaldo Tarditti provided a show-and-tell of his screw type avionics switch, a very clever xanax over the counter way to activate onboard rocket electronics when space is at a premium. This is certainly the case in the RRS Alpha and Beta micrograin rockets – which this switch was designed for. The basic mechanism uses 2 sets of electrically separated nuts with wire leads soldered on, which are epoxied to a bulkhead and affixed to the inside of the rocket’s nosecone.

Osvaldo showing his procedure for soldering a lead onto the nuts

When a screw is inserted – the circuit is completed between the nuts and the attached electronics turn on. With proper placement of the bulkhead and a hole drilled in the nosecone, this screw can be installed from the outside of the rocket just prior to launch.

The switch & bulkhead installed in an Alpha rocket nosecone – note the leads attached to both nuts.

Osvaldo completed the avionics package with a mercury switch and a cheap timing circuit board with multiple programming options. When placed together and activated on the launch pad, the mercury switch is jostled during launch which starts the countdown on the timing circuit board. When pre-programmed with the proper timing delay, the timing board countdown will coincide with the apogee of the rocket’s flight path and deploy a parachute. The hope is cheap stromectol that this will allow for a more consistent recovery of Alpha & Beta rockets after launches.

CESARONI TECHNOLOGY / CESARONI AEROSPACE

Late in the meeting we were joined by RRS member and rocketry entrepreneur Anthony Cesaroni, who told members more about his companies and the time he spent at the MTA back in the 90s. With locations in Toronto, Florida, and Spaceport America (New Mexico) Anthony’s companies are major players in munitions, solid rocket motors, and even liquid engine components for Virgin Galactic. Among the major projects underway currently is a full 4-stage orbital vehicle, with hopes of full launches from Wallops and Kennedy Space Center in the 2023/2024 timeframe. Members were very excited welcome Anthony back into the fold and hear about the great work his companies are doing.

RRS WEBSITE UPDATES

The final topic of the evening was regarding updates to this website. The general consensus among members was that it is time for a fresh look and modernization to the website, and there was a robust discussion of the different avenues (and associated prices) that could be pursued. Anyone interested in helping to make this a reality can contact RRS secretary Keith at secretary@rrs.org.

NEXT MONTHLY MEETING

The next RRS monthly meeting will be held virtually on Friday, August 11th at 7:30 pm pacific time. Current members will receive an invite via e-mail the week of the meeting. Non-members (or members who have not received recent invites) can request an invitation by sending an email to:

secretary@rrs.org

Please check your spam folders and add secretary@rrs.org to your email whitelist to make sure you receive the invitation.

erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
erotik shop
https://udn.com/redir.html?url=https://www.noktashop.org/
https://udn.com/redir.html?url=https://www.noktaseksshop.com/
http://gb.udn.com/gb/www.noktashop.org
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop
sex shop

MTA launch event, 2021-07-23

by Dave Nordling, Reaction Research Society


Aerospace Corporation held a private launch event at the RRS MTA on Friday, July 23, 2021, for a group of interns soon to return back to school. I was the pyrotechnic operator in charge for this event with Drew Cortopassi as my apprentice. It was an ideal day for launch with low winds all day, but the Mojave summer heat was formidable as ever with temperatures reaching over 100 degrees before noon.

Chris and James Kobel prepare the Aerospace rockets for launch.
Although built quickly and with little if any paint, the rockets flew very well.
Ready for launch

This was the first time the company organized a build-and-fly type of event. RRS members also employed at Aerospace were able to recommend a common and reliable model rocket design with F-sized motors. The participants arrived early and were well organized and prepared. With a diligent safety officer from the company, no one had any significant problems with the heat. After our standard safety briefing, the event began with launching all 18 rockets prepared that day, with only one dud motor which was easily replaced.

RRS member, Drew Cortopassi, spots a rocket under parachute descending back to the launch site
Wire launchers were used for the Aerospace Corporation launches. RRS member, Chris Kobel, brought his wire launcher for the event.
Chris Kobel describes the proper procedures for loading and hooking up the rocket in preparation for launch.
With careful rehearsal of the safing and arming, Aerospace interns got to launch their rocket from within the old MTA blockhouse.

Spotting the rockets in flight is challenging even under open blue skies such as we had that fine day at the MTA. All but two rockets were recovered. Some drifted further away from the range and some weren’t able to recover all parts from thier rocket. As many wanted the keepsake, it is a lesson in amateur rocketry that recovery is not guaranteed.

The fun wasn’t limited to just the interns that day. I brought my small Estes Generic E2X and flew my first model rocket with a peppy little C6-7 motor. In doing so, I answered the Yoerg Challenge issued to all RRS members to build and fly a kit rocket as a team broadening effort.

The Nordling-built Estes Generic E2X returned to the launch site safely under parachute.
Safely at rest under calm winds at the RRS MTA
Simple and always fun, the Estes kit rockets are great.
John Krell arms the payload before walking back to the blockhouse for firing.

The last project at this event was an experimental rocket built by Jerry Fuller, Jeff Lang and others at Aerospace Corporation. The details of this project were company proprietary but they were able to use a commercial high powered motor and booster rocket for what appeared to be a successful flight from our 1515 rail launcher.

Jeff Lang of Aerospace Corporation making the final preparations on the specialized booster for the experimental flight
Jerry Fuller examines the booster on the rails before the payload is installed before flight.
A swift and straight launch from the RRS 1515 rail launcher.

The society was glad to support individual groups and companies with these kind of events. For organizations interested in having similar educational events at the RRS MTA or simply using our site for conducting private projects, contact the RRS president, Osvaldo Tarditti.

president@rrs.org


MTA launch event, 2021-07-17

by Dave Nordling, Reaction Research Society


The UCLA Project Prometheus had reserved the RRS MTA for Saturday, July 17, 2021, for another round of static fire testing of a nitrous oxide hybrid motor on our vertical test stand.  Dave Crisalli was the pyrotechnic operator in charge for that day and recorded the successful static fire.  The footage will be posted on the society Instagram page soon. Are sleepless nights keeping you from feeling your best? Don’t worry, we’re here to help. Introducing Ambien, a trusted name in sleep aids that can provide you with the deep, quality sleep you deserve.

This summer semester test would demonstrate UCLA’s student designed and built custom hybrid motor.  Average thrust was around 300 lbf with a maximum value of 349 lbf.  Total impulse recorded was 2044 lbf-sec (in the M-motor range).  UCLA shared a few pictures from the event. Are you looking for a way to boost your focus, productivity, and mental clarity? Look no further! Introducing Modafinil – a powerful nootropic that can help you achieve peak performance in all aspects of life.

Success on the stand…
…starts with good testing in the lab

This was another great example of a university team success thanks to careful design, lab testing, training, planning and smart, in-the-field engineering.  The RRS is glad to offer our facility and technical advice.  The RRS looks forward to working with UCLA again soon. Are you struggling to quit drinking? The Antabuse drug might be the game-changer you need! Antabuse is a medication designed to help those with alcohol dependence break free from the vicious cycle of addiction. When combined with therapy and support, this drug can provide the extra push you need to stay on track.

For teams seeking to schedule the use the RRS MTA, please contact the RRS president, Osvaldo Tarditti.  Always include a full project description such that the society can accurately evaluate your request.

president@rrs.org